Gerard de montrichard



(No'Model.)

G. DE MONTRICHARD.

PUMP.

No.432,426. Patented Ju1y`15, 1890,.

rn: Noam Pew-:ns am, Pun-rauwe., wAsNmaToN, n. cA

UNITED STATES PATENT OFFICE.

GERARD DE MONTRIGHARD, OF MONTMDY, FRANCE.

P u M P.

SPECIFICATION forming part of LettersE Patent No. 432,426, dated July15, 1890.

Application filed July 23, 1888. Serial No. 280,751- (No model.)Patented in France April 15, 1887, No. 182.754, and November 22,1887,110,187,061; in BelgiunrMay 14,1887,No. 77,454, September' 16,1887, No.78,900. and November 3, 1887, No. 79,394; in England August 29, 1887,No. 11,700; in Germany September 22, 1887, No. 48,403, and in ItalySeptember To all whom t may concern.-

Be it known that I, GERARD DE MONTRI- CHARD, a citizen of the Republicof France, residing at Montmdy, France, have invented certain new anduseful Improvements in Pumps, also applicable as Motor-Engines, (forwhich I have obtained Letters Patent in France April 15, 1887, No.182,754, and November 22, 1887, No. 187,061; in Great Britain August 29,1887, No. 11,700; in Belgium September 1G, 1887, No. 78,900, May14,1887, No. 77,454, and November 8, 1887, No. 79,394; in GermanySeptember 22, 1887, No. 43,403, and in Italy September 2G, 1887, No.135/ 22,859,) of which the following is a full, clearl` and exactspecification. According to this invention the piston of a pump-barrelhas imparted to it a rotary motion combined with the to-and-fro motion.The rotary motion maybe transmitted to the piston-rod either by a crank,by a pulley and belt, by other gearing, or by other suitable knownmeans. The to-and-fro motion is imparted by means of rollers acting uponobliquely-curved surfaces, which either cause the piston to slide uponits rod, or, if it be fixed thereon, the piston-rod to slide through thestufiing-box.

Pumps constructed as above described may be used for pumping liquids andgases of all kinds. In this apparatus used as a pump the said rollersare placed in the interior of the cylinder, and the oblique surfaces areformed on the ends of the piston, the openings for suction and dischargebeing formed through the side of the cylinder in suitable position.

In the accompanying drawings kare shown various arrangements forcarrying out the above-described invention.

Figure l shows a longitudinal section of an arrangement in which thepiston is fixed on the piston-rod, the obliquelycurved surfaces beingformed on the piston and acted upon by rollers within the cylinder. Fig.2 shows a longitudinal section of an arrangement in which the pistonslides upon the piston-rod. Fig. 8 shows apart end elevation and partcross-section of the arrangement shown in Fig. l. Figs. 4 and 5 lshowsections of the boss of the piston. Fig. G shows a longitudinal sectionof an arrangement having a piston of different form. Fig. 7 shows across-section of the same.

With these machines the cylinder is generally arranged horizontally, thepiston-rod passing through stuffing-boxes in which it works either onlywith a rotary motion or with a vcombined rotary and longitudinal motion,according as the piston is loose upon the rod or iixed thereon. In theconstruction shown at Figs. l, 2, an-d 8 the piston F consists of ahollowrcylindrical body divided internally into two spaces'by an obliquepartition 1V, and having its ends formed with beveled or oblique curvedor cam surfaces I, While the cylindrical shell is forlned with openings,the positions ot' which are determined by those of the admission anddischarge ports of the cylinder. This piston is, according to thearrangement at Fig. l, fixed on the rod A by' means of a key orothersuitable device, and is adjusted in position in the cylinder E sothat the surfaces I Iare in contact with the rollers J J, which are freeto turn on threaded pins screwed in the side of the cylinder E.

course desirable that the rollers J J, forming inwardly-projecting studsfor holdin g the piston in place, should also be beveled-that is, shouldbe conical-so thatthey will tit evenly against such faces, I I, and thusas the faces wear away and the piston begins to play between the rollersit is only necessary to give the threaded pins a turn, whereby suchrollers will be forced down into close contact with the beveled faces ofthe cams I I and hold the piston snugly in place. The cylinder has atits center two diametrically-opposite branched openings G and II,constituting, respectively, the inlet and discharge ports. The pistonrodA passes through two stuffing-boxes B and C on the covers of thecylinder. It will be seen that if the piston rod or shaft A is ro tatedby the fast and loose pulleys mounted thereon, as shown, the piston Finrotating causes the oblique surfaces Ito slide against The surfaces orcam-faces I being oblique or beveled, it is of the otller end position.

the rollers J, alld is thereby lnade to nlove backward alld forward illthe cylillder, in wllicll lllotioll the pistoll-rod participates. Inrevolving the piston is lllade alternately to bring its side opellingsopposite the illlet alld discharge ports, and at such times theto-andfro lnotion of the piston produces ill the one case a suctionaction, drawing liqllid from the inlet-port illto the cylinder, alld inthe latter case all expellillg action, forcillg the liquid previouslydrawn into the cylinderout through the discharge-pipe.

In sollle cases it is preferable to llse the al'- rangement sllown atFig. 2, ill wlliell the pistoll rod or shaft A does not partake of thetoalld-fro lllotioll of the piston, which slides to alld fro with asquare hole upon a square part D of the shaft, as shown at Fig. 4. Intllis case the one end of the sllaft A does not require te pass througha stuiiing-box on the cylinder-cover, but rllns with its cylindricalelld in a cylindrical cup-bearing C, formed on the inllel side of thecover. The pistoll rod or shaft A may in the case also be formedcylindrical at I), having a feather M `fixed thereon, as at Fig. 5, overwhich the piston slides, with a corresponding groove. The arrangementand action of the machine are otherwise just the sallle as previouslydescribed.

'lhe eonstructioll sllowll at Figs. G alld 7 differs from that abovedescribed in the forln of the piston, which ill this case consists ol' asimple disk obliqllely formed, ill the cylilldrical periphery of whichlits the surface of the cylinder, while curved paths I, formed on itstwo faces, slide in contact with the rollers J, revolving, as before,upon studs G ill the side of the cylinder, the piston in being rotatedtllus caused by the rollers to slide to alld fro in tllecylinder, eitherloose upon the pistoll-rod or fixed thereon, so that the pistonrodslides with it. Thus if ill the drawings at Fig. G the piston is lnadeto slide fronl rigllt to left ill rotating, the cylillder being 'lilledwith liquid, it will force ollt the body of liquid contained in theleft-hand end of the cylinder, wllile it will at the saule time draw ina corresponding charge at the right-hand elld. lith this arrangement theinlet alld discllarge ports A B, Fig. 7, instead of being placed at theends of the cylinder, can be placed at the middle ill lille with eacllotller,

opellillg on eacll side of the piston inllnedi-,

ately beyond the poillt where it is always lnailltailled ill the samelongitudinal position relatively te the cylinder by the rollers J. Therotary motion of the piston taking place at a uniform speed, the speedof the to-alld-fro motion will be variable, being practically zero ateach elld position, froln which the lllotioll is gradually acceleratedtoward the middle position alld then gradually retarded toward The flowof liquid follows this movement; bllt if the passages are sufficientlylarge it will continue in lllotioll while the piston is ,passing thedeadpoints. Under these circumstances it is of advantage to employ asmall air-ellshioll for compensating the `variation in the speed. Theair-vessels may be arranged as at R l, Fig. 7, for this purpose, alldthey nlay be contillllously fed with a small quantity of air by formingin the suction-pipe a small capillary opelling admitting a few bubblesof air at eacll stroke. This air-inlet may be produced either byloosening' slightly one of the joints or by forming a small. passage inone of the screwrplugs V at the top of the air-vessels R. Thelubrication of the piston and rollers is effected by alubricator g,fixed on the cylinder.

Having new particularly described and ascertained the nature of thisinvention and ill what manner the sallle is to be performed, I declarethat what I clailll isl. The combinatiolnwith the cylinder having theinlet and exhaust ports and a pistellrod projecting illto said cylinder,of an illclilled piston located in said cylinder on said rod and havingat eacll elld a continuous illclined cam-surface, and tWo adjustableconical rollers located in said cylinder and bearing agaillst botll endsof said piston, substantially as set forth.

2. The colnbinatiolnwith the cylinder having the illlet and exhaustports, of a piston in said cylinder consisting of a hollow bodyhavingthe beveled calli-faces I formed on its extreme ends, alld openingsarranged between said calli-faces to collllnunicate alterllately withthe inlet alld exhaust ports, said body being divided bya partitionextending diagon ally from end to end thereof, and said partition havinga central square aperture, a pisten-rod having a square portion fltti ng snugly ill said aperture and whose lellgth is eqllal to the range ofnlotion of said partitioll, alld adjustablebeveled studs, betweell whichsaid piston is arranged, adapted to bear against said beveled cams I,substalltially as set forth.

3. The colnbillatioll,with the eylillder havingY inlet and exhallstports alld a pistoll-rod in said cylinder, of a piston on said rodhaving the cam-faces I I at botll ellds thereof, and being provided withside openings between said calns adapted to colnlllllllieate alternatelywith the inlet alld exhaust ports, friction-rollers bearing at botllends of said piston against said cam-faces, and tllreaded pills screwingillto the cylinder alld carrying said rollers for adjusting the latterrelatively to said cam-faces I I, substantially as alld for the purposesset forth.

.GERARD DE BIONTRICIIARD.

Witnesses:

AUG. Jonnlssnn, F. STEINs.

IOO

TIO

